311 static int check_optimized(struct canfd_frame *cf, int start_index)  in check_optimized()  argument
318 	if (cf->len <= CAN_MAX_DLEN)  in check_optimized()
319 		return (cf->len != start_index);  in check_optimized()
327 	return (cf->len != padlen(start_index));  in check_optimized()
331 static int check_pad(struct isotp_sock *so, struct canfd_frame *cf,  in check_pad()  argument
339 			return check_optimized(cf, start_index);  in check_pad()
347 	    cf->len != padlen(cf->len))  in check_pad()
352 		for (i = start_index; i < cf->len; i++)  in check_pad()
353 			if (cf->data[i] != content)  in check_pad()
361 static int isotp_rcv_fc(struct isotp_sock *so, struct canfd_frame *cf, int ae)  in isotp_rcv_fc()  argument
371 	if ((cf->len < ae + FC_CONTENT_SZ) ||  in isotp_rcv_fc()
373 	     check_pad(so, cf, ae + FC_CONTENT_SZ, so->opt.rxpad_content))) {  in isotp_rcv_fc()
386 		so->txfc.bs = cf->data[ae + 1];  in isotp_rcv_fc()
387 		so->txfc.stmin = cf->data[ae + 2];  in isotp_rcv_fc()
411 	switch (cf->data[ae] & 0x0F) {  in isotp_rcv_fc()
442 static int isotp_rcv_sf(struct sock *sk, struct canfd_frame *cf, int pcilen,  in isotp_rcv_sf()  argument
451 	if (!len || len > cf->len - pcilen)  in isotp_rcv_sf()
455 	    check_pad(so, cf, pcilen + len, so->opt.rxpad_content)) {  in isotp_rcv_sf()
467 	memcpy(skb_put(nskb, len), &cf->data[pcilen], len);  in isotp_rcv_sf()
475 static int isotp_rcv_ff(struct sock *sk, struct canfd_frame *cf, int ae)  in isotp_rcv_ff()  argument
486 	so->rx.ll_dl = padlen(cf->len);  in isotp_rcv_ff()
489 	if (cf->len != so->rx.ll_dl)  in isotp_rcv_ff()
493 	so->rx.len = (cf->data[ae] & 0x0F) << 8;  in isotp_rcv_ff()
494 	so->rx.len += cf->data[ae + 1];  in isotp_rcv_ff()
501 		so->rx.len = cf->data[ae + 2] << 24;  in isotp_rcv_ff()
502 		so->rx.len += cf->data[ae + 3] << 16;  in isotp_rcv_ff()
503 		so->rx.len += cf->data[ae + 4] << 8;  in isotp_rcv_ff()
504 		so->rx.len += cf->data[ae + 5];  in isotp_rcv_ff()
533 		so->rx.buf[so->rx.idx++] = cf->data[i];  in isotp_rcv_ff()
548 static int isotp_rcv_cf(struct sock *sk, struct canfd_frame *cf, int ae,  in isotp_rcv_cf()  argument
570 	if (cf->len > so->rx.ll_dl)  in isotp_rcv_cf()
574 	if (cf->len < so->rx.ll_dl) {  in isotp_rcv_cf()
580 	if ((cf->data[ae] & 0x0F) != so->rx.sn) {  in isotp_rcv_cf()
593 	for (i = ae + N_PCI_SZ; i < cf->len; i++) {  in isotp_rcv_cf()
594 		so->rx.buf[so->rx.idx++] = cf->data[i];  in isotp_rcv_cf()
604 		    check_pad(so, cf, i + 1, so->opt.rxpad_content)) {  in isotp_rcv_cf()
646 	struct canfd_frame *cf;  in isotp_rcv()  local
656 	cf = (struct canfd_frame *)skb->data;  in isotp_rcv()
659 	if (ae && cf->data[0] != so->opt.rx_ext_address)  in isotp_rcv()
662 	n_pci_type = cf->data[ae] & 0xF0;  in isotp_rcv()
680 		isotp_rcv_fc(so, cf, ae);  in isotp_rcv()
692 		sf_dl = cf->data[ae] & 0x0F;  in isotp_rcv()
694 		if (cf->len <= CAN_MAX_DLEN) {  in isotp_rcv()
695 			isotp_rcv_sf(sk, cf, SF_PCI_SZ4 + ae, skb, sf_dl);  in isotp_rcv()
707 					isotp_rcv_sf(sk, cf, SF_PCI_SZ8 + ae, skb,  in isotp_rcv()
708 						     cf->data[SF_PCI_SZ4 + ae]);  in isotp_rcv()
715 		isotp_rcv_ff(sk, cf, ae);  in isotp_rcv()
720 		isotp_rcv_cf(sk, cf, ae, skb);  in isotp_rcv()
728 static void isotp_fill_dataframe(struct canfd_frame *cf, struct isotp_sock *so,  in isotp_fill_dataframe()  argument
736 	cf->can_id = so->txid;  in isotp_fill_dataframe()
737 	cf->len = num + pcilen;  in isotp_fill_dataframe()
742 			cf->len = padlen(cf->len);  in isotp_fill_dataframe()
743 			memset(cf->data, so->opt.txpad_content, cf->len);  in isotp_fill_dataframe()
744 		} else if (cf->len > CAN_MAX_DLEN) {  in isotp_fill_dataframe()
746 			cf->len = padlen(cf->len);  in isotp_fill_dataframe()
747 			memset(cf->data, CAN_ISOTP_DEFAULT_PAD_CONTENT,  in isotp_fill_dataframe()
748 			       cf->len);  in isotp_fill_dataframe()
753 		cf->data[pcilen + i] = so->tx.buf[so->tx.idx++];  in isotp_fill_dataframe()
756 		cf->data[0] = so->opt.ext_address;  in isotp_fill_dataframe()
764 	struct canfd_frame *cf;  in isotp_send_cframe()  local
782 	cf = (struct canfd_frame *)skb->data;  in isotp_send_cframe()
786 	isotp_fill_dataframe(cf, so, ae, 0);  in isotp_send_cframe()
789 	cf->data[ae] = N_PCI_CF | so->tx.sn++;  in isotp_send_cframe()
793 	cf->flags = so->ll.tx_flags;  in isotp_send_cframe()
803 	so->cfecho = *(u32 *)cf->data;  in isotp_send_cframe()
816 static void isotp_create_fframe(struct canfd_frame *cf, struct isotp_sock *so,  in isotp_create_fframe()  argument
822 	cf->can_id = so->txid;  in isotp_create_fframe()
823 	cf->len = so->tx.ll_dl;  in isotp_create_fframe()
825 		cf->data[0] = so->opt.ext_address;  in isotp_create_fframe()
830 		cf->data[ae] = N_PCI_FF;  in isotp_create_fframe()
831 		cf->data[ae + 1] = 0;  in isotp_create_fframe()
832 		cf->data[ae + 2] = (u8)(so->tx.len >> 24) & 0xFFU;  in isotp_create_fframe()
833 		cf->data[ae + 3] = (u8)(so->tx.len >> 16) & 0xFFU;  in isotp_create_fframe()
834 		cf->data[ae + 4] = (u8)(so->tx.len >> 8) & 0xFFU;  in isotp_create_fframe()
835 		cf->data[ae + 5] = (u8)so->tx.len & 0xFFU;  in isotp_create_fframe()
839 		cf->data[ae] = (u8)(so->tx.len >> 8) | N_PCI_FF;  in isotp_create_fframe()
840 		cf->data[ae + 1] = (u8)so->tx.len & 0xFFU;  in isotp_create_fframe()
846 		cf->data[i] = so->tx.buf[so->tx.idx++];  in isotp_create_fframe()
855 	struct canfd_frame *cf = (struct canfd_frame *)skb->data;  in isotp_rcv_echo()  local
858 	if (skb->sk != sk || so->cfecho != *(u32 *)cf->data)  in isotp_rcv_echo()
941 	struct canfd_frame *cf;  in isotp_sendmsg()  local
1014 	cf = (struct canfd_frame *)skb->data;  in isotp_sendmsg()
1035 		isotp_fill_dataframe(cf, so, ae, off);  in isotp_sendmsg()
1038 		cf->data[ae] = N_PCI_SF;  in isotp_sendmsg()
1042 			cf->data[SF_PCI_SZ4 + ae] = size;  in isotp_sendmsg()
1044 			cf->data[ae] |= size;  in isotp_sendmsg()
1047 		so->cfecho = *(u32 *)cf->data;  in isotp_sendmsg()
1051 		isotp_create_fframe(cf, so, ae);  in isotp_sendmsg()
1064 			so->cfecho = *(u32 *)cf->data;  in isotp_sendmsg()
1081 	cf->flags = so->ll.tx_flags;  in isotp_sendmsg()